Dobby for looms.



W. KAHRE.

DOBBY FOR LOOMS.

APPLIGATION FILED 1130.9, 1909.

Patented Oct. 4, 1910.

2 SHEETS-SHEET 1.

m/ve 70R,

1m: NORRIS PETERS ra, WASHINGTON, 04 c.

W. KAHRE.

DOBBY FOR LOOMB.

APPLICATION FILED DEG. 9, 1909.

971,846, Patented 0013.4,1910.

2 SHEETS-SHEET 2.

ATTORNEY.

m: nonkls PII'ERS 00., WASHINGTON, n. c.

WILLIAM KAI-IRE, OF WI-IARTON, NEW JERSEY.

DOBBY FOR, LOOMS.

arises.

To all whom it may concern:

citizen of the United States, residing in WVharton, Morris county, and State of New Jersey, have invented a certain new and use ful Improvement in Dobbies for Looms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The principal object of this invent on is to provide a dobby for looms practically adapted for performing such service as the control of the shuttle-boxes, where the boxes to be operated are two or more in number.

My object may be more particularly indicated as follows: In an ordinary dobby the jacks or their equivalents are movable to but two positions, the one the idle position, wherein they stand held against a stop under the pull of the harness or the like to be controlled, and the other the working position, wherein they are held by the floating levers so long as said levers, through their hooks, are oscillated from the reciprocating knives. Since, therefore, only two positions of the acks can be attalned 111 the use of an ordinary dobby, it is impossible to use such a dobby for accomplishing more than a corresponding number of positions as to the part to be actuated, for instance a box structure having three or more boxes.

The object in handto provide a dobby capable of setting its acks or other actuated parts at any of two or more pos1t1onsI have found may be accomplished by constructing the parts so as to permit lost inotion in the train of elements comprising the knives, the box structure or other member to be actuated from them and the parts for transmitting motion from the former to the latter, and by providing for regulating such lost motion so as to obtain any of the several positions which the member actuated is calculated to assume.

In the adaptation of my invention herein shown and described, the lost motion referred to is accomplished as follows: The dobby has a plurality of jacks and corresponding floating levers and hooks. One of the levers has a fixed pivot on its jack; this jack will Specification of Letters Patent.

Application filed December 9, 1909.

Patented Get. 4t, 1910.

Serial No. 532,149.

I therefore serve for deriving two positions Be it known that I, WVILLIAM Karine, a

of the box structure (say the uppermost and lowermost boxes thereof) when it is in its idle position, say, it will call the uppermost box and when in its working or oscillating position, it will call the lowermost box. Another of these levers has a slot-andpin connection with its jack; the slot is of such extent that, allowing lost-motion, the corresponding jack can not be advanced by its lever (when the latter assumes its working or oscillating position) as far as the first lever advances its jack. An intermediate jack position, which may be made to correspond to the working position of a third box, is thus produced. Other intermediate jack positions, corresponding to other boxes, may in like manner be secured, depending on the respective lengths of the slots.

In view of the foregoing my invention consists broadly in a means in a loom for effecting the movements of a member to be shifted to two or more positions, such as a box structure, the same comprising, with knives adapted to reciprocate synchronously in reverse directions, a train of parts adapted to transmit movement from the knives to said member and having a lost motion connection between two of its parts, said train comprising hooks respectively ongageable with the knives and a lever pivotally connecting the hooks.

In the accompanying drawings, the improved dobby has been shown as adapted to shift a box structure or the like to four different positions, Figure 1 showing the improved dobby in operative position on a loom frame and in vertical section in a plane extending transversely of the loom, the parts appearing in this view being those which are utilized to bring the No. 2 box of a box structure A into position and the said structure appearing diagrammatically; Fig. 2 is another similar sectional view taken in a different plane so as to show those parts which are utilized to bring the No. 3 box into position; and, Fig. 3 is another similar sectional view taken in a different plane so as to show those parts which are utilized to bring the No. 4 box into position, it being remarked that the No. 1 position of the box structure corresponds to that position which the parts referred to assume when standing idle.

- lever 71..

a is the frame of the loom and Z) the frame of the dobby. In the dobby frame 6 are arranged to slide synchronously in reserve directions the knives 0.

(Z designates a horizontal shaft. forming a part of the frame Z) and serving as a fulcrum for the jacks e, c, c which, in their rest or idle positions, engage a bar carried by brackets g projecting from the frame I). 72., h and h are the jack-levers, the same being pivotally connected with the jacks e, c and e, res aectively, as herein after explained. i denotes stops against which these jack-levers may abut, the same being adapted to be engaged by the upper and lower ends of the ack-levers.

j and j designate an upper and a lower hook pivotally connected to each jack-lever h, it and it, said hooks being adapted for movement together vertically by being both supported by one of several lifting wires whose vertical movements are effected by one of several levers Z corresponding in number to the wires and controlled from a suitable pattern mechanism m.

The knives 0 are reciprocated, through the medium of suitable links '22, from a lever 0 fulcrumed at 2), in the usual manner.

Referring, now, to Fig. 3, the jack-lever 71, is pivotally connected to its jack 6 by a pivoting pin g which is fixed with respect to each of these two parts. The jack 0 is therefore capable of assuming either the position shown in full lines or that shown in dot-and-dash outline, according to whether the hooks are disengaged from the knives, allowing the jack to rest against its stop f, or whether the hooks are engaged with the knives and the ack-lever is therefore being vibrated around a relatively advanced fulcrum. As already stated, the dot-and-dash outline position of the jack 0 corresponds to the position where box No. at of the box structure A in Fig. 1 is alined with a fixed plane B, which may represent the surface of the batten; while the full-line position of the jack corresponds to the position where box No. 1 is alined with the plane B.

In Fig. 2, the pivoting pin q is fixed with respect to one of the parts 6 and h and is passed through a slot 8 in the other. In the adaptation shown the pin is fixed in the jack 0 and the slot 8 is formed in the jack- The slot extends from said pin 9 to the left (when the jack-lever it and the jack 6 are against their respective stops). .Vhen, now, the hooks are engaged with their knives, the slot 5- will allow some lost motion as between parts 6 and it, so that jack 6 cannot be drawn and held as far forward by its ack-lever it while the same is oscillating as the jack 6 in Fig. 3 can be drawn and held forward by its ack-lever It. The slot is made sufiiciently long so that when the jack 0 is drawn forward into the dot-anddash outline position in Fig. 2 its advancement to this position will be suflicient to bring No. 3 box of the box structure A in alinement with the plane B.

In Fig. 1, the pin is fixed in the jack 6 and penetrates a slot .9" in the jacklever, said slot being formed precisely the same as the slot 8, except that it is extended somewhat farther to the left than the latter. This slot therefore affords greater lost motion as between the ack-lever h and the ack 6 than is afiorded by the slot 8 as between the jack-lever it and the jack 6, with the consequence that when the jack-lever h is oscillating under the action of the knives, it

will hold its jack-lever e not as far advanced as jack-lever It holds the jack 6 under the same condition. The dot-anddash outline of the ack-lever in Fig. 1 represents its position under this condition andcorresponds to the position occupied by box No. 2 when alined with the plane B. The jacks e, e and c are connected with the box structure A each by its own flexible connections t, 2 and t, the same being passed around suitable pulleys u and all of the same length.

Resume: hen, therefore, all the jacks rest against the stop f, box No. 1 is alined with plane B; when jack 6 is drawn forward to the dot-and-dash outline position in Fig. 1, box No. 2 is alined with plane B when jack 6 is drawn forward to the dotanddash outline position in Fig. 2, box No. 3 is alined with plane B; and when jack 6 is drawn forward to the dot-and-dash outline position in Fig. 3 box No. at will be alined with plane B.

In actual practice, the jack-levers h and It (which have the slots) will not usually stand engaged with both stops 2' when in their idle positions, although they are so shown in Figs. 2 and 3 for the purpose of clearer illustration; instead, each will be left standing at that time engaged with only one of these stops (see Fig. 1), because the pull of the box which is exerted on the jacklever so long as it is oscillating ceases to act on the same as soon as, on the pattern mechanism calling the parts to their idle position, the jack comes in contact with its stop f. On the parts being again called into action, the lost motion manifests itself either in a short idle advance of the knife before it engages the hook (as the upper hook and knife in Fig. l) or in an idle shifting of the jack-lever until its unengaged end (as its upper end in Fig. 1) finds a purchase on the adjoining stop, depending of course on which knife, upper or lower, goes first into action.

In Figs. 1 and 2 a set-screw a is shown at the left-hand end of each slot, whereby the extent of lostmotion may be adjusted with the purpose of bringing boxes 2 and 8 of the box structure into accurate alinement With the plane B.

Having thus fully described my invention, What I claim and desire to secure by Letters Patent is:

The combination, with normally retracted members to be moved to different positions, of a supporting structure having a stop limiting the retracting movements of said members, knives reciprocating synchronously in reverse directions and adapted to effect the movement of said members away from the stop, trains of parts adapted to transmit movement from the knives to said members and each comprising hooks and a lever pivotally connecting said hooks and pivotally connected With one of said members, and means for controlling the hooks, one of the mechanisms comprising one of said members and the corresponding train of parts having a lost-motion connection between tWo of the elements thereof, substantially as described.

In testimony, that I claim the foregoing I have hereunto set my hand this 7th day of December, 1909.

WILLIAM KAHRE.

Vitnesses J OHN W. STEWARD, M. D. BELL. 

